diff --git a/aegisub/packages/osx_bundle/Contents/Info.plist b/aegisub/packages/osx_bundle/Contents/Info.plist
index 3a4e4f500..3e8a326b9 100644
--- a/aegisub/packages/osx_bundle/Contents/Info.plist
+++ b/aegisub/packages/osx_bundle/Contents/Info.plist
@@ -20,6 +20,8 @@
 	<string>APPL</string>
 	<key>CFBundleSignature</key>
 	<string>agsu</string>
+	<key>NSPrincipalClass</key>
+	<string>NSApplication</string>
 
     <!-- Bundle version -->
     <!-- This should be bumped on any major changes -->